NEETChemistryp Block Elements (Group 13 & 14)
Which of the following statements about BF ₄⁻ and AlF ₆³⁻ are correct? (i) B and Al differ in their oxidation states. (ii) B and Al differ in their covalency. (iii) B obeys the octet rule. (iv) B and Al are in diagonal relationship.
Options
- A(i), (ii)
- B(ii), (iii), (iv)
- C(i), (ii), (iii)
- D(ii), (iii)
Correct answer
D. (ii), (iii)
Step-by-step solution
BF ₄⁻ and AlF ₆³⁻ have different covalency. BF ₄⁻ contain 8 electron in their octet. Therefore, statement (ii) and (iii) are correct.